蛇油中脂肪酸成分的GC—MS研究

用溶剂热抽提蛇油脂肪和ＫＯＨ／甲醇酯交换甲酯化,以气相色谱－质谱联用技术测定脂肪酸组成,鉴定了２９种脂肪酸成分,其中含量较高的成分有肉豆蔻酸,棕榈油酸,棕榈酸,亚油酸,油酸,硬脂酸,花生四烯酸,二十碳三烯酸,二十碳二烯酸,二十二碳四烯酸等．蛇油中不饱和脂肪酸的含量占脂肪酸总量的６３％以上．     

电场作用油葵种子后苗期生长抗干旱性的试验

用不同强度的匀强电场作用油葵种子一定时间,实验测定电场对幼苗根系活力、植株缺水程度和抗旱生长的影响．结果表明：油葵种子受电场作用后能够提高苗期生长的抗干旱性能     

利用真实砂岩微观孔隙模型研究粘性不稳定指进

利用真实砂岩微观孔隙模型进行了不同油水粘度比下的油水两相驱替试验,研究了粘性不稳定指进;提出了控制注入水粘性指进的注入速度及油水粘度比的要求,对指导油田生产有一定的意义。     

茶叶矿质元素浸出量与茶叶冲泡时间及冲泡次数的关系

研究了茶汤中茶叶１０种矿质元素（Ｋ、Ｃａ、Ｍｇ、Ｐ、Ａｌ、Ｆｅ、Ｍｎ、Ｓｒ、Ｂａ、Ｚｎ）的浸出量与茶叶冲泡次数以及冲泡时间的关系．结果表明：（１）茶叶中１０种元素的浸出量与茶叶冲泡次数之间具有显著的指数函数相关,相关方程为ｙ＝ａｅ－ｂｘ,１０种元素的浸出量与茶叶冲泡时间之间具有显著的对数函数相关,相关方程为ｙ＝ａ＋ｂｌｇｘ,各元素在两方程中的相关显著性均为α＜０．０１;（２）性质相近的元素,如Ｂａ与Ｓｒ在上述函数中的变化行为更为相近;（３）元素Ｋ、Ｚｎ、Ａｌ、Ｍｇ浸出比在３０％以上,可认为是易浸出元素,而元素Ｍｎ、Ｆｅ、Ｓｒ、Ｂａ、Ｃａ的浸出比低于３０％,可认为是较难浸出元素;（４）茶叶与茶汤之比为１∶１０,冲泡水温１００℃,冲泡时间２分钟,３泡茶汤已能充分利用茶叶中常见的人体营养元素Ｋ、Ｍｇ、Ｐ、Ｍｎ、Ｚｎ,元素浸出量与总浸出量之比在６０％以上．     

青海高原春小麦籽粒蛋白质积累规律研究

分析了阿勃,青春５３３,青农４６９、青农４５２等四个春小麦品种（品系）在青海西宁地区籽粒蛋白质相对含量的变化规律和蛋白质绝对含量的积累进程,结果表明,从开花至成熟,籽粒蛋白质相对含量的变化呈“Ｕ”型曲线,并以花后籽粒发育初期含量最花,花后３１天左右是该地区春小麦籽粒中蛋白质相对含量最低的时期。不同品种在花后不同时期蛋白质相对含量各不相同;籽粒蛋白质绝对含量的积累过程呈“Ｓ”形曲线,可用概率转换方程     

Nα-quinaldyl-L-arginine·HCl,a new defensive alkaloid fromSubcoccinella-24-punctata (Coleoptera,Coccinellidae)

The isolation of N-quinaldyl-L-arginine·HCl (1) from the CoccinellidaeSubcoccinella-24-punctata is reported. The structure, first established on the basis of the analysis of the spectral properties of1, has been confirmed by synthesis. The alkaloid is of endogenous origin and markedly deterrent to ants.     

Molecular evidence for increased hematopoietic proliferation in the spleen of the b/b laboratory rat

The splenomegaly and the appearance of a significant number of CFU-E (erythroid colony-forming units) and BFU-E¹ (erythroid burst-forming units) in the Belgrade laboratory rat (b/b) spleen prompted us to analyse further the molecular evidence for increased hematopoietic proliferation in the b/b spleen. Messenger RNAs (mRNAs) specific for globins, proteins for iron transport and deposition and the band 3 protein were used in rat erythropoietic tissues as markers for proliferation and erythroid differentiation. In the b/b spleen, all mRNAs analysed display an erythroid-specific pattern of expression. This analysis also revealed an enhanced level of mRNA for ferritin in the +/b spleen, whereas erythrocyte-specific mRNA production was normal.     

Antiviral activities of anthraquinones,bianthrones and hypericin derivatives from lichens

The antiviral activities of some naturally occurring anthraquinones bianthrones, and hypericin derivatives were compared by the end-point CPE (viral cytopathic effects) method and plaque assays. Under optimal conditions of exposure to light, hypericin, 7,7-dichlorohypericin and 5,7-dichloroemodin exhibited strong inhibitory activity against HSV-1 (herpes simplex virus type 1) in both assays. Partial inactivation of the virus was shown by emodin, 7-chloroemodin and 7-chloro-1-O-methylemodin; the bianthrones and other anthraquinones were found to be inactive. Antiviral activity appeared to be, positively correlated with increasing substitution of chlorine in the anthraquinone structure. In the absence of light, only hypericin and 7,7-dichlorohypericin displayed detectable activity.     

Cyclophosphamide-impaired regulation of hepatic heme metabolism

Summary Im male rats hepatic cytochromes b₅ and P-450 were reduced at different times after treatment with cyclophosphamide (CP) (200 mg/kg i.p. for 3 days). In contrast, microsomal heme did not change until 48 h after the last dose of CP, leading to accumulation of heme in a non-cytochromal form. Parallel to the above changes the heme metabolism showed derangement: -aminolaevulinate synthase, the rate-limiting enzyme in heme synthesis, was depressed and heme oxygenase, the enzyme which catalyzes the oxidative degradation of heme, was increased.     

1420轧机修配工艺的技术改造

主要阐述了轧机油膜轴承和轴承座的修复与改造的工艺方案,并详细介绍了关键零部件的修复与改造的具体方法.